PPT-EMBRYOLOGICAL AND PHYSIOLOGICAL EVIDENCES OF EVOLUTION

DR SHARMISTHA CHAKRAVARTY DEPT OF ZOOLOGY BARNAGAR COLLEGESORBHOG introduction Embryology is the study of development of embryo from zygote till it becomes an offspring The different stages in the development of individual organs are known as ontogeny and the study of the history of development of species or race is called its phylogeny . Presenter . – . Dr. . Pulkit. . Agarwal. Moderator . – . Dr. . G.S.Renukananda. EMBRYOLOGY. 4. th. to 8. th. week from 5 Swellings. (Ectoderm). 1. st. Arch. Ectodermal thickenings(5. th. Tunbosun. B. . Oyedokun. , Neil . Dunse. & Colin Jones. Institute for Housing, Urban and Real Estate Research. School of Built Environment. Heriot. -Watt University, Edinburgh. United Kingdom. Outline. As you know humans have 46 chromosomes in their body cells, how many chromosomes are present in the sperm that . is . fertilizing this egg.. 12. 23. 46. 92. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. and symmetry and highly specialized cellsare simplest animals. ialized cells embedded in gel-like Cellular level of organization with no tissues or organs 1. The only major animal group phyla to lack Tunbosun. B. . Oyedokun. , Neil . Dunse. & Colin Jones. Institute for Housing, Urban and Real Estate Research. School of Built Environment. Heriot. -Watt University, Edinburgh. United Kingdom. Outline. Cases from PEO studies. RATNA ANJAN JENA. ADVISER, PEO. Planning Commission. Government of India. http. ://planningcommission.gov.in. Evidence-based . policy has been defined as an approach which “helps people make well informed decisions about policies, . Last week we talked about. …. The universe had a beginning. God must be the creator of the universe. 3 views Christians can faithfully hold: Old-Earth Creationism, Young-Earth Creationism, Theistic Evolution. Definition. TYPES OF ABORTIONS. Threatened Abortion. It is a type of abortion where process of miscarriage has started but has not progressed to the state from which recovery is impossible. Inevitable Abortion. (Hons), Zoology. Panjab University, Chandigarh. ORIGIN OF UNIVERSE. BIG BANG THEORY. Thermonuclear explosion. Origin of universe occurred 20 . bya. .. ORIGIN OF EARTH. NEBULAR HYPOTHESIS. Condensation of gases under Gravitational force. These evidences are based on the . comparative study of the embryos. . of various animals.. Von Baer. noticed . remarkable similarities. among . vertebrate embryos. , however, their adults were quite different.. of . the Red . Queen. CfE. . Advanced Higher Biology. Unit . 2: . Organisms and Evolution. SQA mandatory key information. A change in the traits of one species acts as a selection pressure on the other species. . Anatomical Evidences:. Body . organisation. Vertebrate organ-systems. Homologous organs: the organs of different animals having similar position, structure and embryonic origin are called homologous organs.e.g. vertebrate forelimbs the forelimbs of seal,bird,bat,horse and man. . Evolution. – when a species of plants or animals adapts to their environment in order to survive over a long period of time. Key points!. Species. Plants or Animals. Adaptations. In order to survive. MARKS-14½. What is doctrine of evolution?. 1 1. What is homology?. 2 1. Describe homology with respect to fore limb in animals. . 3 2. Give examples of homology in plants.. 4 1½.